Democrats are clearly trying to get their ducks in a row as they make their final push before a potential vote on a Senate health bill and the much-anticipated Congressional Budget Office "score."

Nelson, Lincoln and Landrieu are the remaining holdouts. None of the three has made their intentions clear on a potential final or even cloture vote.

This meeting could be telling.

*** UPDATE *** The three centrist holdouts were invited by Reid to this meeting, according to Reid spokesman Jim Manley.

In the meeting, Reid is "walking them through the particulars of the bill," Manley said.

When asked if the majority leader was looking for committments on a vote, Manley's response was, "The leader is always looking for committments."

The first big vote could take place as early as Friday or Saturday. (It would be a vote for cloture to move forward and start debate. It's a key vote because 60 votes are needed on this to defeat a filibuster.)